The document discusses different types of nouns:
1) Common nouns refer to general categories and do not refer to specific people, places, animals or things. They are spelled with lowercase letters.
2) Proper nouns refer to specific people, places, animals or things. They are always capitalized.
3) Examples of proper nouns include names of people, places, continents, countries, days of the week, and months. Compound proper nouns can be made of more than one word.